Improvement in packing-rings



E. SULLIVAN.

Packing Rings. "No.149,6l7. K lfuentedAfprilmnm,A

Wm Wm.

NITED STATES PATENT QEEICE.

EDWARD SULLIVAN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO WILLIAM REA ANDGEORGE T. ROBINSON, OF SAME PLAGE.

IMPROVEMENT IN PACKING-RINGS.

Specification forming part of Letters Patent No. 149,617, dated April14, 1874; application iiled December 13, 1873.

To all whom 'it may concern:

Beit known that I, .EDWARD SULLIVAN, of Pittsburg, in the county ofAllegheny. and State of Pennsylvania, have inventeda new and usefulImprovement in Packing-Rings; and I do hereby declare the following tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawing forming a part of this specification, in,

section forming one ot' the laps, the section being smoked at one end toprevent it from welding, so that when the ring is cut opposite to thesmoked part it shall be free to expand. It also consists in forming thedivision-lines of the laps on a bevel.

To enable others skilled in the art to make and use my invention, I willdescribe its construction and operation.

Hi-therto these rings have been made by casting, and then planing orcutting the laps B and C. This method, on account of the eX- tremelydelicate work of finishing the laps to make their adjacent facesperfectly true, is very slow andcostly. Y,

Tosimplit'y, shorten, and cheapen the manufacture of these rings is theobject of this in.- vention.

I cut a curved piece, a, as shown in Fig. 4, which, having smoked7 atone end, I set in the side of the moldr in which the ring A is cast. Themolten metal unites with the unsmoked end of the piece a., and flowsaround, but does not weld with the smoked end. When the casting iscompleted, I cut or sever the ring, as at i', opposite to the smokedpart of the piece a," then the ring is free to expand. This Way offorming the ring with its laps is easy and inexpensive, while the linesof division between the laps is perfectly true, and require nolinishing.

I have found the old or plain lap is objectionable, because the end ofthe outer one throws up and admits the steam between them, which cutsoff the corners, and causes the ring to leak. I prevent this by cuttingthe adjacentfaces on a bevel, as shown at c. The overlapping edge of thelap O guides and holds the lap B as the ring expands. The follower,being bolted against the side of the lap, prevents its lateraldisplacement.

The piece a may be made by casting a ring with a beveled upper edge andcutting it in sections. The hole c is made to cause it to unite morereadily in casting. This piece may be smoked in the middle, and leftfree to unite with the ring at both ends.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The method of forming the ring A with its laps B and G, by castingupon a section, a, properly smoked, and freeing the laps by cutting, asat i, substantially as described.

2. The laps B and C, having a beveled line of separation, c,substantially as described.

ln testimony whereof I, the said EDWARD SULLIVAN, have hereunto set myhand.

EDWARD SULLIVAN.

Witnesses:

FREDERICK STANDIsH, T. B. KERR.

